return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCOH (ethynol)

using model chemistry: BLYP/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/cc-pVDZ
 hartrees
Energy at 0K-152.508532
Energy at 298.15K-152.509134
Nuclear repulsion energy57.398310
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at BLYP/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3563 3569 63.46      
2 A' 3428 3434 85.49      
3 A' 2214 2218 108.77      
4 A' 1232 1234 74.30      
5 A' 1044 1046 79.38      
6 A' 605 606 36.57      
7 A' 348 348 9.45      
8 A" 509 510 40.03      
9 A" 362 362 10.45      

Unscaled Zero Point Vibrational Energy (zpe) 6652.2 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 6662.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at BLYP/cc-pVDZ
ABC
21.17710 0.31630 0.31165

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.121 0.000
C2 0.080 1.340 0.000
O3 -0.169 -1.194 0.000
H4 0.161 2.412 0.000
H5 0.717 -1.620 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5
C11.22161.32622.29691.8825
C21.22162.54651.07543.0275
O31.32622.54653.62170.9831
H42.29691.07543.62174.0702
H51.88253.02750.98314.0702

picture of ethynol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 179.422 C1 O3 H5 108.299
C2 C1 O3 176.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.001      
2 C -0.022      
3 O -0.111      
4 H -0.038      
5 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.478 -1.000 0.000 1.784
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.918 -2.441 0.000
y -2.441 -12.133 0.000
z 0.000 0.000 -18.346
Traceless
 xyz
x -1.679 -2.441 0.000
y -2.441 5.500 0.000
z 0.000 0.000 -3.821
Polar
3z2-r2-7.641
x2-y2-4.786
xy-2.441
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.953 -0.008 0.000
y -0.008 5.771 0.000
z 0.000 0.000 1.687


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000